Prof. Witold Szczechla from Warsaw University, Poland, is visiting us from October 23 to December 20. Welcome! Carlos Eduardo Marciano, post-master student at UFRJ, Brazil, is visiting us from September 13 to December 9. This visit is in the framework of the THANES project. Welcome! Pr. Vladimir Gaitsgory from Macquarie University, Australia, is visiting us from Sept. 1 until Oct. 31. Welcome!